The Specificity of the Potassium Channel for K⁺ Over Na⁺

question 43

Multiple Choice

The specificity of the potassium channel for K⁺ over Na⁺ is mainly the result of the:

• A) differential interaction with the selectivity filter protein.
• B) hydrophobicity of the channel.
• C) phospholipid composition of the channel.
• D) presence of carbohydrates in the channel.
• E) presence of cholesterol in the channel.

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Definitions:

Slope Failure

The movement and failure of slope material caused by gravity, water saturation, or other destabilizing factors.

Crater Walls

The steep sides that define the rim of a crater, often formed by explosions, impacts, or volcanic activity.

Steep

Characterizes an area of land having a sharp incline or slope, often referring to terrain that rises quickly over a short distance.

Heavily Cratered

Describes a surface, typically of a planet or moon, that contains a large number of impact craters from collisions with other celestial bodies.